In the “Subscriptions” drop-down box in the top right corner, select the VPS you’d like to manage

Click the “System” tab in the menu bar

Click the “Server Info” button

Click the “Recreate Server” option.

Select the operating system you’d like your VPS to be re-created with. Choose and confirm a password for the “root” user.

When you are sure you would like to continue, click the “Destroy and Recreate” button. At this point all data on your VPS will be erased and the server will be re-installed with the operating system selected.